We look at the division of 42003351 by 801 
The aim is to understand the frequency of 801 in 42003351.

Going ahead to step 1:
801 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 801

Step 2:
The number 801 fits into 42 0 times, leaving a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Include the next digit (0) from the dividend after 42, then repeat: 420 / 801

Advancing to step 3:
The number 801 fits into 420 0 times, leaving a remainder of 420.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 420 after subtracting 0 from 420.
Fetch the next digit (0) from the dividend, attach it to 420 and continue: 4200 / 801

Advancing to step 4:
The number 801 fits into 4200 5 times, leaving a remainder of 195.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
The remainder is 195 after subtracting 4005 from 4200.
Bring next digit (3) of the dividend behind the 195 and repeat the process: 1953 / 801

Moving on to step 5:
801 goes into 1953 2 times with a remainder of 351.
Use 2 as the next digit of our solution. 
Result so far: 52.0
If we take 1602 away from 1953, we end up with 351.
Grab the next digit (3) from the dividend, add it to 351, then carry on: 3513 / 801

Advancing to step 6:
When dividing 3513 by 801, we get 4 with a remainder of 309.
Use 4 as the next digit of our solution. 
Result so far: 524.0
The remainder is 309 after subtracting 3204 from 3513.
Fetch the next digit (5) from the dividend, attach it to 309 and continue: 3095 / 801

Moving on to step 7:
If we divide 3095 by 801, we get 3 and a remainder of 692.
The next digit of our result is 3. 
Result so far: 5243.0
Subtract 2403 from 3095 to get 692.
Bring next digit (1) of the dividend behind the 692 and repeat the process: 6921 / 801

On to step 8:
The number 801 fits into 6921 8 times, leaving a remainder of 513.
The number 8 becomes the next digit in our result. 
Result so far: 52438.0
If we subtract 6408 from 6921, we get 513.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5130, and continue the process.

Moving on to step 9:
The number 801 fits into 5130 6 times, leaving a remainder of 324.
Write down 6 as next digit of the result. 
Result so far: 52438.6
The remainder is 324 after subtracting 4806 from 5130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Going ahead to step 10:
When dividing 3240 by 801, we get 4 with a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 52438.64
Subtracting 3204 from 3240 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 11:
360 divided by 801 is 0 with a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 52438.64
If we take 0 away from 360, we end up with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Step 12:
When dividing 3600 by 801, we get 4 with a remainder of 396.
Record the quotient 4 as the next digit in the result. 
Result so far: 52438.6404
If we take 3204 away from 3600, we end up with 396.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3960, and continue the process.

Moving on to step 13:
801 goes into 3960 4 times with a remainder of 756.
The next digit of our result is 4. 
Result so far: 52438.64044
Subtract 3204 from 3960 to get 756.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7560, and continue the process.

Our division results in 52438.64044 with a remaining 0.000756.